Ruler



F. NISLEY.

RULER (No Model.)

No. 422,033. Patented Peb. 25, 1890.

` Aria/mfr.

UNITED STATES PATENT OFFICE.

FRANK NISLEY, OF MIDDLETOVVN, PENNSYLVANIA.

RU LER.

SPECIFICATION forming part of Letters Patent No. 422,033, dated February 25, 1890*.

Application iiled November 30,1889, Serial No. 332,118. (No model.)

T0 all who-m it may concern:

Be it known that I, FRANK NISLEY, a citizen of the United States, residing at Middlep town, in the county of Dauphin and State of Pennsylvania, have'invented certain new and useful Improvements in Rulers; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters of reference marked thereon.

This invention relates to certain new and useful improvements in rulers; and it has for its object to provide a ruler adapted for use in ruling large books, and by the employment of which a line may be drawn to the extreme center of the book without inking the adjoining page.

The ruler is reversible, allowing it to be used equally well on either` side of the book.

The novelty resides in the construction of the ruler wherebj7 the above ends are accomplished.

The invention is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in which- Figure l is a side elevation of my ruler. Figi 2 is a perspective View thereof.

The ruler is formed of any suitable material and of a length to suit the purpose for which it is to be used, it being designed to make rulers of varying sizes for the varying uses to which they are apt to be put. Near one end it is formed with a protuberance or projection a, which is adapted to fit in the center of a book between the opposite pages, allowing the ruler to lie flat upon the page which it is desired to rule. One side of this other side is slightly convex, as shown at c, the convex side being of such a shape as t-o press the page opposite the one being ruled out of the way to keep it frombecoming inked by the pen when ruling.

Inuse the projection is pressed into the space at the center of the book between the pages and the shoulder of the pen resting against the ruler, which should be of sufficient thickness to provide for this. The peculiar shape of the projection allows a line to be drawn to the extreme center of the book without inking the adjacent page. The edges wit-h whichthe pen comes in Contact in ruling` may be beveled, as shown at d, if desired.

What I claim as new isl. A ruler provided with a transverse projection, as set forth.

2. A ruler provided with a transverse pro jection having a convex side, as set forth.

3. A ruler provided with a transverse proj ection having a eoncaved side, as set forth.

4s. A ruler provided with a transverse project-ion having one side convex and the other concave, as set forth.

5. A ruler provided with a projection and having its acting edges beveled, as shown.

(i. A ruler provided with a projection having a concaved side and having its acting edges beveled, the bevel extending to and upon the concaved portion, as shown.

In testimony that I claim the above I have hereunto subscribed my naine in the presence of two witnesses.

Y FRANK NISLEYa Vitnesses:

S. C. PErEEs, I, B. KELLER.

projection is concaved, as shown at b, and the 4o 

